25002780 has 96 divisors (see below), whose sum is σ = 78236928. Its totient is φ = 5913600.

The previous prime is 25002779. The next prime is 25002793. The reversal of 25002780 is 8720052.

It is a self number, because there is not a number n which added to its sum of digits gives 25002780.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27940 + ... + 28820.

It is an arithmetic number, because the mean of its divisors is an integer number (814968).

Almost surely, 2^25002780 is an apocalyptic number.

25002780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25002780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39118464).

25002780 is an abundant number, since it is smaller than the sum of its proper divisors (53234148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25002780 is a wasteful number, since it uses less digits than its factorization.

25002780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947 (or 945 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 25002780 is about 5000.2779922720. The cubic root of 25002780 is about 292.4126117787.

The spelling of 25002780 in words is "twenty-five million, two thousand, seven hundred eighty".